ISO 812:2006 硫化或热塑性橡胶 低温脆性的测定

标准编号：ISO 812:2006

中文名称：硫化或热塑性橡胶 低温脆性的测定

英文名称：Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness

发布日期：2006-06

标准范围

ISO 812:2006规定了一种方法，用于确定橡胶材料不表现出脆性破坏的最低温度或测试中使用的一半测试件在规定条件下受到冲击时失效的温度。由此确定的温度不一定与材料可以使用的最低温度有关，因为脆性将受到测试条件的影响，尤其是受到冲击速率的影响。因此，只有在变形条件与试验中规定的条件相似的应用中，通过该方法获得的数据才应用于预测橡胶在低温下的性能。描述了三个过程:工序A，其中测定脆性温度；步骤B，其中测定50%失效的脆性温度；程序C，其中在指定温度下冲击测试件。程序C用于橡胶材料的分类和规范目的。

ISO 812:2006 specifies a method for determining the lowest temperature at which rubber materials do not exhibit brittle failure or the temperature at which half of the test pieces used in a test fail when impacted under specified conditions.The temperatures thus determined do not necessarily relate to the lowest temperature at which the material can be used since the brittleness will be affected by the conditions of test and especially by the rate of impact. Data obtained by this method should, therefore, be used to predict the behaviour of rubbers at low temperatures only in applications in which the conditions of deformation are similar to those specified in the test.Three procedures are described:

• procedure A, in which the brittleness temperature is determined;
• procedure B, in which the brittleness temperature for 50 % failure is determined;
• procedure C, in which the test piece is impacted at a specified temperature.

Procedure C is used in the classification of rubber materials and for specification purposes.

标准预览图